Locomotive-boiler



PATBNTED JAN. 19, 1904. J. WISTER. LOGOMOTIVB BOILER. APPLICATION FILEDFEB. 18, 1903.

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TNE NORRIS PETERS 00.. FHOTO-UTHO WASHIABTUN r c UNITED STATES PatentedJanuary 19, 1904.

PATENT OFFICE.

JONES VVISTER, OF PHILADELPHIA, PENNSYLVANIA.

LQCO lVlOTlVE-BOILER.

SPECIFICATION forming part of Letters Patent No. 750,145, dated January19, 1904.

Application filed February 18, 1903. Serial No. 143,931. (No model.) I

To all whom it mag concern:

Be it known that I, J oNEs WISTER, a citizen of the United States,residing in Philadelphia,

Pennsylvania, have invented certain Improvements in Locomotive-Boilers,of which the following is a specification. I

The object of my invention is to so construct a boiler for locomotivesas to reduce the expense of the same and permit of repairs to the boilerwithout withdrawing the locomotive from service during the time thatsuch repairs are being made. manner hereinafter set forth, referencebeing had to the accompanying drawings, in which Figure 1 is alongitudinal section, partly in elevation, of a locomotive-boilerconstructed in accordance with my-invention; and Fig. 2 is a transversesection of the same.

In order to adapt it to the ordinary disposition of the frame,running-gears, and. operating parts of a locomotive as at presentconstructed, I retain the ordinary locomotiveboiler shapethat is to say,the longitudinal barrel 1 with depending fire-box 2 at the rear end andsmoke-box 3at the forward endbut the longitudinal barrel and fire-boxshell in the present case constitute no part of the steam generatingstructure, but form simply a combustion-chamber casing. Hence they arenot subjected to pressure and all of the expensive crown-bars, crown-barhangers, and other internal stays of the ordinary locomotive-boiler aredispensed with. In place of the tubular which is inserted within thelongitudinal barrel 1 and projects over the fire-box, so that theproducts of combustion in their passage from the fire-box to thesmoke-box will circulate usual cylindrical form; but in the present inThis object I attain in the stance I have shown it as of rectangularform in order to confine the'products of combustion more closely to theinternal boiler and I have shown the smoke-box 3 enlarged at the top forthe reception of a steam-drum 8, which is connected to the ends of theupper longitudinal manifolds 4: and communicates with the pipe 9,whereby steam is conveyed to the cylinders of the engine, the usualexhaust-nozzle 10 being located in the smoke-box in advance of saidpipe. When said exhaust-nozzle is removed, the smoke-box portion of thepipe 9 disconnected from the lower portion of the same, and the feedconnections of the boiler disconnected therefrom, said boiler can beWithdrawn longitudinally from the forward end of the smoke-box wheneverany repairs become necessary and another boiler can be readilysubstituted for it, so that the engine is not withdrawn from serviceduring the time that the repairs to the boiler are being effected, inthat way overcoming a serious obj ection to ordinary locomotives, inwhich the whole machine is incapacitated during all the time that boilerrepairs are being made.

The boiler may be supported upon rollers, rails, or the like on theinside of the combustion-chamber casing, rails 11 being shown in thepresent instance. I

Instead of withdrawing the boiler through the front end of the smoke-boxthe top of the combustion-chamber casing may be detached and the boilermay be lifted from its position in said casing by means of a suitablecrane.

To protect the fire-box casing. and barrel from the heat of the productsof combustion, said parts may have a suitable refractory ornon-conducting lining, as shown at 12, and to prevent loss of heat byradiation the fire-box casing and barrel may be provided with a coveringof non-conducting material.

closed except at the ends, a depending fire-box communicatingwith oneend of said chamber and an outlet-stack communicating with the other endof the same, and a water-tube boiler contained wholly within saidcombustionchamber. substantially as specified.

2. A locomotive-boiler having an outer casing which contains acombustion chamber closed except at the ends, a depending fire-boxcommunicating with one end of said chamber and an outlet-stackcommunicating with the other end of the same, and a water-tube boilercontained wholly within said combustionchamber andprojecting over thedepending fire-box, substantially as specified.

3. A locomotive-boiler having an outer casing which contains acombustion chamber closed except at the ends, a depending fire-boxcommunicating with one end of said chamber and an outlet-stackcommunicating with the other end of the same, and a water-tube boilercontained wholly within said combustion chamber, and removable throughone of the ends of the casing, substantially as specified.

4. A locomotive-boiler having an outer casing which contains acombustion chamber closed except at the ends, a depending fire-boxcommunicating with one end of said chamber, an outlet-stackcommunicating with the other end of the same, a water-tube boilercontained in said combustion-chamber and rails or bars in the lowerportion of the combustion-chamber for the support of said boiler,substantially as specified.

5. A locomotive-boiler having a fire-box and a longitudinalcombustion-chamber casing enlarged at the forward end, and a watertubeboiler contained in said casing and having at the forward end asteam-drum con tained in said enlarged portion of the casing,substantially as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

J ONES VVISTER. Witnesses:

CHARLES C. NORRIS, J r., F. E. BncHToLD.

